Battery-cell hydrometer



P. D. IVEY AND A. l. SALISBURY.

BATTERY CELL HYDROMETER.

APPucATloN FILED APR. 14, i919.

1,354,255, PantedSept. 28, 1920.

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'and a threaded exter1or portion 2.

UNITED STATES Pasteur OFFICE.

PERCY DOUGLAS IVEY, OF GUELPH, ONTARIO, AND ALFRED JAMES SALISIBURY,y OF TORONTO, ONTARIO, CANADA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THE IVEY STORAGE BATTERIES, LIMITED, OF TORONTO, CANADA, A CORPORA- TION OF ONTARIO.

BATTERY-CELL HYDROME-TER.

Specification of Letters Patent.

Patented Sept. 28, 1920.

To all whom t may concer/rt:

Beit known that we, PERCY DOUGLAS VEY,

of the city of Guelph, in the county of Viel-f lington, in the Province of Ontario, Canada, and ALFRED JAMES SALISBURY of the city of Toronto, in the county .of 2York, in the rovince of-Ontario, Canada, have invented certain new and useful Improvements in Battery-Cell Hydrometers, of which the following is the specification.

ur invention relates to improvements in battery cell hydrometers particularly adaptable to cells having opaque walls whereby the hydrometer readings will be always readily visible at all times and it consists essentially of the following arrangement and construction of parts as hereinafter more particularly explained.

Figure 1, is a perspective view of a portion of a cell top showing our hydrometer and hydrometer housing 1n position.

Fig. 2, is a vertical section through Fig. 1..

1n the drawings'like characters4 of reference indicate corresponding parts in the various figures.

1 indicates the cell top which is composed of an upper and lower layer of rubber 1X and 1 respectively and an intermediate filling of asphaltum 12. An orifice 13 is formed in the upper layer of Vrubber 1X. 2 indicates a glass dome provided at its lower end with an annular outward] extending fian 2X ter the asphaltum has been poured on to the rubber `layer 1 and the top l placed in position the lower portion of the glass dome is inserted in the hot asphaltum before 'it sets so .as to be embedded therein.

3 indicatesa rubber sleeve or guideway secured in the rubber 1 so as to extend upwardly through the asphaltum 12 into the dome 2. 4 indicates a dome like cover adapted to fit the lass dome 2 and is provided at its lower en with an internall threaded portion 4 adapted to be screwe on to the threaded portion 2O of the dome 2. 5 indicates our hydrometer which is provided with a. stem 5 which extends freely through the sleeve 3 and is provided at its upper end with a graduated portion 5 which co-acts with the hair line 2 marked upon the glass dome 2 to give the reading. The lower end of the hydrometer is supported by the liquid 6 within the battery cell and as the density of the liquid decreases the hydrometer falls, giving the required reading by the hair line 2. i

When it is required to make a reading all that it is necessary to do is to remove the 4cover 4 when the hydrometer may be easily and immediately read.

AWhat we claim `as our invention is.

1. In a storage battery a transparent dome secured in one of the walls of the cell, a guide way covered thereby, extending -through the Wall and designed to-receive hydrometer.

2. In a storage battery, the combination with the lid and guide-way extending therethrough, and a hydrometer extending up through the guide-way, of a transparent dome secured to the lid and extending over the guide-way and hydrometer, and a cover for the dome suitably secured in position thereon.

3. 'In a storage battery. the combination' PERCY DOUGLAS IVEY. ALFRED JAMES SALISBURY.

Witnesses:

B. BOYD, K. D. PoYsoN. 

